Hacker news (http://news.ycombinator.com) is a very influential forum used by a combination of techies entrepreneurs. There is always a slew of articles about bitcoin on there, I think it would be useful to have one or more Volunpeers assigned to watch out for articles on there and comment on there to raise awareness.
The audience on there is definitely full of early adopters and we would likely see good traction via that medium. I’ll probably comment when I can, but don’t really have the time to monitor it properly.